An automatic control method for edge drop of cold-rolled electrical steel

Abstract

The invention relates to an automatic edge dropping control method for cold rolling electrical steel. The automatic edge dropping control method relates to a setting control part and an online control part. The setting control part comprises a setting calculation part and a self-learning part, and the online control part comprises a feedforward control part and a closed loop feedback control part. The setting calculation part comprises two trigger moments, namely the moment when a steel reel enters a rolling plan and the moment when the steel reel enters an edge dropping instrument in front of an inlet of a first rack, stable incoming material fracture surface data are detected by the edge dropping instrument, and the three calculating modes including edge dropping presetting, edge dropping setting and edge dropping resetting are triggered. By means of the automatic edge dropping control method, high-quality automatic control over full length edge dropping of a cold rolling electrical steel plate strip can be achieved, the production efficiency is improved, and the product competitiveness is improved.

Description

technical field [0001] The application belongs to the field of mechanical automation control, and in particular relates to an automatic control method for edge drop of cold-rolled electrical steel. Background technique [0002] Cold-rolled electrical steel is a ferrosilicon alloy with a silicon content of 0.5% to 4.8%. It has excellent electromagnetic properties and is an indispensable and important magnetic material in the electric power, electronics and military industries. The cumulative thickness difference of a large single sheet of electrical steel after lamination will be unacceptably large, and at the same time, it will cause uneven magnetic conductivity and affect the magnetic conductivity of the product; therefore, the requirements for edge drop of cold-rolled electrical steel are very strict; The edge drop of the strip in the cold rolling process is mainly caused by the uneven elastic flattening between the work roll and the strip and the difference in the resista...

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Problems solved by technology

[0002] Cold-rolled electrical steel is a ferrosilicon alloy with a silicon content of 0.5% to 4.8%. It has excellent electromagnetic properties and is an indispensable and important magnetic material in the electric power, electronics and military industries. The cumulative thickness difference of a large single sheet of electrical steel after lamination will be unacceptably large, and at the same time, it will cause uneven magnetic conductivity and affect the magnetic conductivity of the product; therefore, the requirements for edge drop of cold-rolled electrical steel are very strict; The edge drop of the strip in the cold rolling process is mainly caused by the uneven elastic flattening between the work roll and the strip and the different resistance of the metal to the lateral flow at the edge and middle of the strip. At present, the edge drop control usually adopts T -WRS technology, roll cooling technology, PC mill technology, etc.; but these technologies have not realized the high-precision automatic control of the full-length edge drop of the strip; and the realization of the automatic control of the full-length edge drop of the strip is very important for improving the electrical steel strip It is very important to reduce the quality of the whole length and improve the production efficiency and product competitiveness in today's increasingly fierce competition among iron and steel enterprises.

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